/*
 * Parser.java
 * Klass som laddar och parsar en textfil
 * Med utseendet:
 * 
 * <|component|>
 *	COMPONENT NAME 
 * 	<|TEXT|>
 * 	blahblahblah
 * 	</|TEXT|>
 *
 * 	<c>text<t>target
 * 	<c>text<t>target
 * 
 * <|component|>
 * 
 *etcetc.....
 *
 * Karl-Adam Karlsson
 * 06-11-15
 *
 */

 import java.io.*;
 import java.util.*;


public class Parser {
	BufferedReader myReader;
	LinkedList components;
	Interactiveator myIact;

	public Parser(String filename, Interactiveator iact){
		myIact = iact;
		
		try{
			components = new LinkedList();
			FileReader fR          = new FileReader( iact.getContext("docs/"+filename) );
 			myReader = new BufferedReader(fR);
		}catch(FileNotFoundException fnof){
			fnof.printStackTrace();
		}
	}//end of konstruktor
	
	/*
	 * Parses the file that was assigned to myReader in the constructor.
	 * Returns a LinkedList with the Komponent components.
	 * The first Komponent in the list is considered the start.
	 *
	 * @return LinkedList A list of the Komponent components resulting from the parsing.
	 *
	 */
	public LinkedList parse(){		
		String line = new String();
	try{
		while( ( line = myReader.readLine() ) != null ){
			
			
			line = line.trim();
			
			if( line.equals("<|component|>") ){
				//Skapa en component, och lägg till sist
				Komponent k = new Komponent( myReader.readLine().trim() );
				components.addLast(k);
				// De andra kommer alltså att manipulera den sista komponenten i
				// listan.	
			}else if( line.equals("<|TEXT|>") ){
				// Text, mums. Läs in och lägg till komponenten.
				LinkedList text = new LinkedList();
				
				while( !line.equals("</|TEXT|>") ){
					line = myReader.readLine();
					line = line.trim();
					
					//someText = someText.concat( line );
					text.addLast(line); 
				}//end of subwhile
				
				//Lägg till texten i sista komponenten
				((Komponent)components.getLast()).setText(text);	
			}else if( line.startsWith("<c>") ){
				//choicetag. choice och target.
				line = line.split("<c>")[1];
				//System.out.println("Line: "+line);
				String tmpLines[] = line.split("<t>");
				//tmplines[0] är choice strängen, tmpLines[1] är target.
				((Komponent)components.getLast()).addChoice(tmpLines[0].trim(), tmpLines[1].trim());
			}
			
			
		}//end of while
		myReader.close();
	}catch(IOException ioe){
		ioe.printStackTrace();
		//System.exit(1);
	}
		
		return components;
	}//end of parse() 




//TEST
/*
public static void main(String args[]){
	Parser p = new Parser("test.txt");
	LinkedList ll = p.parse();
	
	for(int a=0;a<ll.size();a++){
		((Komponent)ll.get(a)).debugPrint();
	}
}
*/
}//end of Class